Add basic GUI support (#17)

.qmllint.ini

@@ -0,0 +1,33 @@
+[General]
+DisableDefaultImports=false
+
+[Warnings]
+AccessSingletonViaObject=warning
+AttachedPropertyReuse=disable
+BadSignalHandlerParameters=warning
+CompilerWarnings=disable
+Deprecated=warning
+DuplicatePropertyBinding=warning
+DuplicatedName=warning
+ImportFailure=warning
+IncompatibleType=warning
+InheritanceCycle=warning
+InvalidLintDirective=warning
+LintPluginWarnings=disable
+MissingProperty=warning
+MissingType=warning
+MultilineStrings=info
+NonListProperty=warning
+PrefixedImportType=warning
+PropertyAliasCycles=warning
+ReadOnlyProperty=warning
+RequiredProperty=warning
+RestrictedType=warning
+TopLevelComponent=warning
+UncreatableType=warning
+UnqualifiedAccess=warning
+UnresolvedType=warning
+UnusedImports=info
+UseProperFunction=warning
+VarUsedBeforeDeclaration=warning
+WithStatement=warning